Why is there a yellowish substance on my underwear that smells like urine?

Yellowish discharge with a urine-like odor on underwear may be caused by delayed cleaning, vaginitis, cervical lesions, or other reasons. It is recommended to seek timely medical evaluation at a hospital to determine the underlying cause and receive appropriate treatment.

1. Delayed Cleaning

When secretions on underwear appear light yellow and are accompanied by a urine-like odor, this is usually normal and may result from not washing promptly. Attention to skin hygiene is important. It is recommended to clean the external genital area regularly with warm water and to wash underwear promptly.

2. Vaginitis

Yellowish discharge with an odor on underwear could indicate vaginitis. A common type is bacterial vaginosis, caused by anaerobic bacterial infection in the vagina, which typically presents with increased and yellowish vaginal discharge. Bacterial vaginosis is usually treated with topical metronidazole suppositories combined with oral metronidazole tablets.

3. Cervical Lesions

Cervical lesions often manifest as increased yellowish discharge. When pathogens infect the cervix and trigger inflammation, inflammatory stimulation can lead to yellow vaginal discharge, resulting in yellow stains on underwear. Patients with such conditions often experience contact bleeding. If cervical lesions are diagnosed, specific treatments should be administered accordingly.

In daily life, individuals should maintain good local hygiene, avoid improper cleaning that may lead to secondary infections, and refrain from unhygienic sexual practices to protect their overall health.